I've never looked for blogging software on the Linux platform, I only used the Scribe Fire plugin for Firefox once. I felt uncomfortable with it, so I've got this idea.
How is this "implemented"?
There's blogging software available in the repositories, but having tried pretty much all the apps, none of them are very good. Some aren't even actively maintained any more.
There are many blogging apps, but quantity is no substitute for quality. It's a sad state of affairs where I'd rather shutdown my machine, boot up Windows and type out a blog post in Windows Live Writer than to just use the tools available natively.
I apologise if I seem outraged or angry, but I think that Windows Live Writer is a very good tool and we don't have any blogging software that even remotely compares. To say that we do and mark it as implemented is just plain deceit.
Saying that this is "implemented" b/c "There already exists an awful lot of gnome blogging applications" is rather silly. Most applications don't work with the most popular blogging services (e.g., blogger / blogspot).
Allowing Microsoft free reign in this important niche market (important because it directly influences content makers and publishers) is terribly short-sighted. WLW is today more important than Outlook used to be a few years back.
I agree with inbonobo and Flamekebab,
The only reason I still have windows installed is WLW. It is simply the best. I tried bloGTK and drivel and neither come close.